摘要
根据应县木塔层间模型(比例为110)的拟动力试验结果,考虑材料性能劣化和残损状态,得到了木塔实体结构四线型非线性恢复力模型;根据能量等效,分析计算了在选择的地震波作用下相应层的最大位移及不同损坏状态下各层的耗能;提出古建筑木结构的双参数地震损坏准则,初步划分了震害等级及标定参数。通过对地震引起的残损指标的计算,指出在烈度8度的地震影响下,应县木塔二、三层有倒塌的可能;在烈度7度的地震影响下,这两层可能产生严重破坏。发现在地震作用下,木塔各层倾斜和残损部分耗能能力的降低是木塔损坏加剧的重要因素。
The 4 line nonlinear model was obtained by pseudodynamic testing of a 1/10 scaled model of Yingxian wooden tower in consideration of its material performance deterioration and structure damage state. Under different seismic waves, the horizontal elastic plastic displacements of each storey were analyzed in terms of equivalent energy principle, and the dissipated energy in different damage states were discussed. The damage grade of old wooden building and marked corresponding parameters were preliminarily classified. Two parameter seismic damage norm on ancient wooden building were proposed to perform the seismic appraisement of the wooden tower. It is pointed out that there is the possibility of the second and third stories of the tower to be collapsed under 8 degree earthquake intensity and seriously damaged under 7 degree earthquake intensity. The decrease of the tower energy dissipation ability due to the damaged parts and remained displacements is the main factor that makes the tower seismic resistance ability weak.
出处
《建筑结构学报》
EI
CAS
CSCD
北大核心
2004年第2期91-98,共8页
Journal of Building Structures
基金
国家青年基金资助项目(50308016)。
关键词
木结构
地震反应
双参数地震损坏准则
能量等效
古建筑
Yingxian wooden tower
seismic response appraisement
two parameter earthquake damages norm
